Electric spark-gap.



j R. H. WAPPLER.

ELECTRIC SPARK GAP.

APPLICATION FILED MAR. 13, 1913.

l@75,75 Patented 0015.7, 1913.

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.espinasseherstarten; une. serien-ne. entre e To'e-ZeuLotn/t y concerter it leso l at lll, literie-irene' 1dr kVA-1 rane, a citizen oli the United States, residing at?l New' Ycrl': city',- eouiity' and- State' oit New Yorld haa'fe invented a newandimproved Electric Sparkltap, o1* which' the following is a1 a n,

This inY ion-relates-toaneleotrie spark' gap corn-posed ot ai plurality of' sparking4 celflst whichI are' constructed im a novel man# ner and permit a read i regulaftimrhot the spark to any' length-des1fred,even below the' length obtained when using but a single celia The spark is so constructed; that it may be readily assembled and taken apart and? comprises various novel'. features ot con-l struction more fully pointed out in= thel apL pended speeineatien and! claims.

In the accompanying drawing: Figure 1' is a :liront-visitent a sparki gapY embodying my invention; Fig. 2 a right hand end View thereof; Fig. 3 a vertical cross seotionyon line 3 3, Fig. 1, and' Figs d' an enlarged vertical section on line'di-d, Fig. 2, partly in' View and partly broken away.

My improved sparkgap whi h generating high frequency electric current of high voltage, is composed ot a pair ot horizontally extending spaced plates 10, each of said plates carrying at its ends, sockets 11', secured to the plates by screws 12. Within the opposed sockets 11 are securely tted insulating rods 13 which are preferably made of glass. 'llo plates 10 are soldered or otherwise secured vertically disosed bars 1d, the lower ends of which are rmly connectedby an insulating rod 15, secured in position by screws 16, while the upper ends of bars 1e carry outwardly extending bolts 17 which may be clamped t0 the usual binding posts 18 projecting forward trom the therapeutic or other machine to which the spark gap is to be coupled.

Between rods 13, 13, 15 is received a plurality of sparking cells, each of which is composed of a pair of opposed cup-shapeds members 19. rll'he members of each cell are spaced from each other by means of insulating circular disks 2O which are preferably composed oit mica. Within each cup 19, is centrally disposed a conductive stud or projection 21, the tree fiat end of which extends flush with the edge 22 or" the cup. Each disk 2@ is provided with a central perforapeci'cation of 'Letters atent.

is adaptedv n to be used in con]unct1on with means for rai-tentamens.. t,

tion# 23,. the dia'rfiefter' or whliehK neeeds the diameter ot stud' intermediate the adjaeent mips* oit each pair sparking: cells :le arranged a squared disk or plate' $111 madel or' conductive material. For holding' these' parte togetl-ier,- the'- studs 211 are provided with threaded bares5 25 that engage screws 26- htted into corresponrling` aimed pertorations et each disk 2412 and into'the cupi-shaped members 19" oli the adjacent oeils;l lin: this way,7 a plurality of units is cnuneold,t each being. com-- posed et a squared disk 241' and` a pair oil members 19' secured to and extending'- out# ward from' the sides ot said disk. Disks 2t i are made ot a sine tov be snugly receivedl between rods 13 and to rest on rod 15; The

outer members 19 ot the flanking cells are l`secu'red' toI disks 2d by means of screws 26 that engage the studs 21? eti-said outer rrienr` bers and outer oblong. reinforcing blocks- 2'?. The latter are engaged by' central screws 28 and lateral screws 29, ot which screws 2.8"

are'- tapped into plates 10 and bars 14, whilescrews 29 are tapped into platesflO only. By prop rly tightening. said screws the cell units 1 221, 19l and the intermediate mica' disks 20 are securely held in position.

lVhen high tensioned current is applied to bolts 17, sparks will be formed between the opposed studs 21 of each cell, the number of cells and the thickness of the mica disks 20 determining the combined spark length. By extending disks 20 comparatively far into the cells and providing them with a central opening 23 only, the sparks are bound to be formed intermediate studs 21, which operation will prevail even after protracted use and after a corresponding heating of the cells, any passage of current between the opposed rims of cups 19 being prevented by the inwardly extending mica disks 20. 2

For regulating the spark length, any selected number of cells may be short-cir1 cuited, for which purpose disks 241 are per forated as at 30, in proximity to the upper `corners of such disks. Each row of alined so that thespark length regulated at will..

@ne ci the anking disks 2e carries a contact 33 preferably made oi' silver and secured to said plate by a screw 34:. This Contact is arranged in axial alinement with one row ci erforations 30, so that by introducing rod 3l from the other end of the device, all of the sparking cells may be rendered inoperative, and a spark may be formed intermediate contact 33 and rod 3l, the length of which is less than the thickness of one mica disk 20 lt willbe seen that by m construction,

sa spark gap is obtaind whic is reliable in.

operation evenv after having become heated owing to protracted use. llt further permits a regulation ci the spark length 'Within the Widest range, whereby the spark length :may be reduced below' Ithat of a single cell.

Finally the 'spark gap is so constructed that its constituent parts may-@be readily assembled and taken apart, and that the combined spark length may be adjusted at Will by correspondingly varying thethickness of thev insulating cell units.

Iclaim: r Y l, An electric spark gap composed of a disks 20 arranged between the .plurality of sparking cell-units, each unit comprising a disk and a pair of outwardly opening cu -shaped members secured thereto, mutual y opposed projectionsv arranged centrally Within said members, and centrally i Lernort perforated insulating disks intermediate the cell-units.

2. An electric spark gap composed of a plurality of sparkin comprising perforate conductive disks and a pair of outwardly extending cup-shaped members secured. to said conductive disks,

mutually opposed projections arranged cen4 trally Within saidfmembers, centrally periorated insulating disks intermediate the cell-units, and a short-circuiting rod adapted.

to engage the perforationso theA conductive disks.

v3. An electric sparmng gap composed of cell-units, each unit a pair of conductive-danking disks, one of which is perforated? an inwardlyextending contact on the other disk arranged opposite the perforations 0f the other disk, perforated conductive intermediate disks arranged between the danking disks, cup-` shaped members secured to both sides of the intermediate disks, inwardly extending cup# shaped members secured to the danking disks, mutually opposed projections Within the cups, perforated insulatingdisks intermediate the open ends of said members, 'and a short-circuitinrod adapted to engagethe perforations of t contact.

j Anninnonn n. Warrnnn. Witnesses: i

FRANK. n

Karmann-Nn Koen'.

e conductive disks and the 

